They had that thing way back in the comics when Pepper and Happy were on the outs, and Tony and Pepper sort of hooked up and Pepper said no. It really didn't work out the first time.

I didn't mind Pepper and Henry Hellrung (he kinda looks like Tony Stark, but he's so laid lack, he'd mold) but she scared him off because she wanted to shag him.

Tony/Pepper.

Pepper knows better.